Once authentication by "login with edugain" option fails, it is not possible to see the login page again, but this issue occurs in every attempt:
----SAML2 exception: Responder: SimpleSAML_Error_Exception: This service needs at least one of the following attributes to identity users: eduPersonTargetedID, uid. Unfortunately not one of them was detected. Please ask your institution administrator to release one of them, or try using another identity provider.---
Once authentication by "login with edugain" option fails, it is not possible to see the login page again, but this issue occurs in every attempt:
----SAML2 exception: Responder: SimpleSAML_Error_Exception: This service needs at least one of the following attributes to identity users: eduPersonTargetedID, uid. Unfortunately not one of them was detected. Please ask your institution administrator to release one of them, or try using another identity provider.---
The only solution is cleaning cookies.